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Monosaccharides are formed by single saccharide
molecules.
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We normally talk about glucose, fructose &
galactose as monosaccharides. There are so many except these three.
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When we talk about starches, they are digested to
various types of monosaccharides, disaccharides by gut enzymes secreted from
various organs like pancreas.
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There are same enzymes which digest disaccharides to
monosaccharides. They are placed on brush border of the mucosal cells.
Isomoltase, Moltase, Sucrose.
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After the digestion final product is monosaccharides
& they are transported across the intestinal mucosal cells to the portal
system by various transport mechanisms.